:first-of-type

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

CSS 伪类 :first-of-type 表示一组兄弟元素中其类型的第一个元素。

尝试一下

语法

css
:first-of-type {
  /* ... */
}

示例

装饰第一个段落

HTML

html
<h2>Heading</h2>
<p>Paragraph 1</p>
<p>Paragraph 1</p>

CSS

css
p:first-of-type {
  color: red;
  font-style: italic;
}

结果

嵌套元素

下面这个例子展示了如何选中多层嵌套元素。注意当不存在简单选择器时，通配符（*）是默认应用的。

HTML

html
<article>
  <div>This `div` is first!</div>
  <div>This <span>nested `span` is first</span>!</div>
  <div>
    This <em>nested `em` is first</em>, but this <em>nested `em` is last</em>!
  </div>
  <div>This <span>nested `span` gets styled</span>!</div>
  <p>This `p` qualifies!</p>
  <div>This is the final `div`.</div>
</article>

CSS

css
article :first-of-type {
  background-color: pink;
}

结果

规范

Specification
Selectors Level 4
# first-of-type-pseudo

浏览器兼容性

BCD tables only load in the browser

参见